Loki could also show signs of fear, though he would try to hide it. Inside, he knows the power that Thanos wields. But on the outside, he would maintain a facade of bravado. His reactions would be a mix of his natural cunning and the instinct to survive in a very dangerous situation.
Loki might react with anger. He could seek revenge against Odin, plotting ways to undermine his power or expose his wrongdoings. This reaction is common as it shows Loki's pride and his unwillingness to be a victim.
Well, Thor might be a bit shocked at first. He'd probably be amused by some of the wilder interpretations of his brother in the fanfiction. Captain America, on the other hand, would likely be confused by the whole concept as it's so different from the traditional stories he's used to. Iron Man would probably make sarcastic comments about how creative the fans are in coming up with these stories.
Loki could be surprisingly empathetic. He would see a bit of himself in Peter, perhaps, as someone who has been misunderstood. So he'd try to befriend Peter and give him advice on how to handle the bullies without using violence, like using his intelligence.
Loki might initially be shocked. He's used to being the one in control and causing chaos, not the one on the receiving end of pain from mortals. He could be filled with rage and vow revenge against Shield, using his wits and remaining magic to plan a counter - attack.
At first, Loki could be a bit stunned. He'd take a moment to process the news. Then, his protective instincts would kick in. He might start making plans right away, like ensuring the safety of the reader and the unborn child. He could also be a bit in awe, realizing that he is about to be a father and thinking about all the new experiences that come with it. He'd likely be very tender towards the reader from that moment on, always making sure she's comfortable and has everything she needs.
In some cases, the reader could be in a state of shock and disbelief. They might not believe that this is really happening. But as they come to terms with the situation, they could start to form a plan. Maybe they try to appeal to Loki's better nature, if they believe he has one, by talking about his past actions and relationships that show his capacity for good.
She might try to manipulate Loki. Natasha is very good at getting into people's heads. She could play on Loki's ego or his own insecurities to gain an advantage. For example, she could pretend to be interested in his plans or offer to help him in some way, all while secretly planning her escape.
Loki would probably be defiant at first. He has a strong sense of self - pride and would not easily submit to Thanos's abuse. He might hurl insults and threats at Thanos, even though he is in a vulnerable position.
At first, Bruce might be scared. He knows Loki's reputation for being unpredictable and dangerous. But he also tries to keep his cool because he doesn't want to accidentally transform into the Hulk right away. He might try to reason with Loki, using his intelligence to talk his way out of the situation.